Hairbrush



FIG. 1 is a perspective view of a hairbrush showing my new design;

FIG. 2 is an enlarged front elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is an enlarged rear elevational view thereof;

FIG. 6 is a right side elevational view thereof; and,

FIG. 7 is a bottom plan view thereof. 

CLAIM The ornamental design for a hairbrush, as shown and described. 